This page explains how Alan Chen (USATT# 88147)'s rating went from 1234 to 1246 at the LYTTC Friday Pro League event from 1 Dec 2012. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.